where \(({\bf F}_4)_{ij}=y_{n+i}^{b-n-j}\,i,j=1,\dots , b-n\) , and \({\bf F}_1\)  is the principle \(n\times n\) 
submatrix of \({\bf F}\) . Applying the property of the determinant of block
matrices [1]}
to (REF ), we obtain
\(|{\bf F}|=|{\bf F}_4| |{\bf T}|\,,\) 
